No...then the US would just be called the UN...
The United States was a charter member of the United Nations when it was created October 24th 1945 during the administration of Harry Truman.
Afghanistan joined the united nations in 1946
Bangladesh joined both the Commonweath of Nations & the United Nations in 1974.
austria joined th united nations in 1861.
Harry Truman was President when the UN was formed - the US was in it from the start.
United Nations
Albania joined the United Nations on December 14, 1955.
Malawi joined the United Nations on December 1, 1964.
Swaziland joined the United Nations on the 24th of September, 1968.
Pakistan joined united nations on 30th September 1947
Israel became a country on May 14, 1948, but joined the United Nations on May 11, 1949.